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What is the diameter of a circle when the area is 81pi square feet?
Wiki User
∙ 9y ago
Area = pi*r*r = 81*pi
=> r^2 = 81 => r = 9 so d = 2*r = 18 ft.
Wiki User
∙ 9y ago
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What is the circumference of a circle if the area is 81pi?
14
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What is the diameter of a circle if the area is 81pi?
18
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What is the circumference of a circle if the area is 81pi?
14
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